Movement

Creating Movement in Wood by J. Christopher White (External Link)

CREATING MOVEMENT IN WOOD
Imagine a falcon in a dive, his speed and control move you to awe, he has performed something amazing. A high speed film can catch the bird with crisp detail but it stops the bird. Slower speed film would leave a blur tracing behind the bird, the detail would be lost to a degree, but something of the movement would be captured. The above is one form of movement, physical movement. To translate the awe inspiring speed of the bird into wood requires converting physical movement into the illusion of movement. This is done by adding a contrail to the bird and blurring the detail.  Your eyes can’t pick up crisp detail on a moving target, only a profile of head of shoulder and wing. Crisp detail over the entire piece would make it static in this case.